Hypodermic syringe device



Jan. 22, 1957 B. FRIEDMAN HYPODERMIC SYRINGE DEVICE IN V EN TOR Bem/AMW efeogww HAY ,Ilsvmwuld s Filed April 9, 1954 United HYPGDERMIC SYRINGE DEVICE Benjamin Friedman, New York, N. Y.

Application April 9, 1954, Serial No. 422,118

11 Claims. (Cl. 12S-418) This invention relates to hypodermic syringe devices.

lt is an object of the present invention to provide a novel mounting means .for securing a hypodermic cartridge and needle in assembled relation and alsofor quickly. and easily mounting the cartridge within the barrelV of a syringe device.

Another object is to provide a novel cartridgek andi. needle construction for sealing the openend of the cartridge and permitting the needle to project thereinto inv communication with the cartridge interionsaid construction being disclosed as comprising a cartridge having at one'end thereof a relatively wide flange-portion and .a

reduced neck portion adjacent the latter and -forming therewith a shoulder surface extending approximately.

transversely of the axis of the cartridge, said cartridge being hollow and having an axial opening' extending.

through said flange and neck portions and communicating with the hollow interior of the cartridge, said flange por. tion having an end face extending approximately .transf verseiy of the cartridge axis, a plug formed ofresilient yieldable material and having an enlarged :angeportion integral with a body portion, said plug body portion projecting into said' cartridge opening and gfrictionally engaging the interior surface of the latter, saidplugilange portion lying against said end face of the cartridge ange portion and in sealing engagement therewitlna hollow.

needle extending coaxially of. the cartridge and through.-`

said plug and having one end in communication with the interior of the cartridge.

A further object is to provide that saidmounting means include a closure means engaging said cartridge shouldersurface and, said plug llange portion for pressing. the..

latter inwardly toward the shoulder surface to maintain the plug ange portion in a sealed engagement with said cartridge end face.

Another object is to provide said mounting means with an externally threaded portion adapted to be screwed in'to` the internally threaded end of a syringe barrel to permit the entire sub-assembly of mounting means, needle and cartridge to be easily assembled to or removed from the barrel.

Still another object is to providea construction of the character described above, whereby the sub-assembly of.

cartridge, mounting meansand needle may bemarketed separately as a unitif so desired.,

A further object is to provide an annular `shoulder portion on said mounting means for abutment against a surface of the syringe barrel to limit axial movement of Other objects and advantages of the present invention. are inherent in the structure as claimed and disclosed, or will become apparent to `those skilled' inthe art as the?. detailed descriptionproceeds in connection withthe ac-.

companying drawing whereinz' Patented Jan. 22, 1957 ice Fig. l-is a side elevational View of a syringedevice mountiugmeans instead'of the two-piece construction shown in Figs. l to 3.

Referringnow to the drawings in more detail, and in particular -to Figs. l to 3 thereof, the reference numeralL 11 indicates generally a hypodermicsyringetdevice'in accordance with the present invention and comprising ahollow cylindrical barrel' 12. As shown in Fig. l,

barrel 12 is cut away along longitudinal opposite sides thereof at- 13, 14 to provide longitudinally extending slots through the cylindrical wall of barrel 12 to permit visual observation of the contents of a cartridge placed therein:`

The upper end of barrel 12 is provided with an en larged portion 1S having integral therewith an angular flange 16a projecting outwardly to provide a grip portion adapted to be engaged by the index and middle lingers of theoperator.

which a closuremember 17 may be screwed. Closure member. 17 comprises an externally threaded portion 18 engageablc with the internal threads 16 and anupwardly projecting hollow, cylindrical bearing sleeve portion 19 having a bore Zlltherethrough'for slidably receiving a rod 21. f

The upper end of the rod 21 has secured thereon a conventional thumb yengaging knob 22. The lower end of rod 2l is externally threaded at 23 `so as to have mounted thereon an internally kthreaded sleeve (not shown) which may be yemployed with cartridges having a particular type of plunger, as disclosed in more detail in said prior copending application S. N. 331,616. The extreme llower end of rod k21 is provided with a reduced downwardly projecting cylindricalportion 24 which is both externally threaded. yand provided therethrough with an internally threaded bore so as to adapt the device 11 for use with' cartridgeshaving two other types of plungers.`

The lower end fof barrel 12 is open and is provided with internal threads 26 for engaging the externally threaded portion 27 of a mounting means indicated generally by the reference numeral 28. in the modification shown in Fig. 3, mounting means Zit comprises a needle mounting member indicated generally at 29 and a closure cap indicated generally `at Needle mounting member 29 comprises a knurled enlarged annular liange 31 having an upper shoulder surface 32 vadapted to abut against the lower end surface.

33 of barrel 12 so as to limit the axial displacement of needle mounting member 29 relative to barrel 12 as the former is screwed into the latter. The externally threaded portionl yof needle mounting member 29 is located immediatelyl adjacent shoulder surface 32. Extending upwardly from the externally threaded portion 27 is :i hollow cylindrical portion 34 forming a cylindrical recess 35 in the `top end or needle mounting member 29..

Closure cap Vil may be press-fitted within cylindrical recess 35 for a purpose to be described below..

Locatedfwithin the interior of barrel 12 is a hollow cylindrical cartridge 36 adapted to contain an injectable antibiotic or other medicinal preparation. The lower end of cartridge 36 is tapered inwardly at 37 toward a rela?, tively narrow neck potrion 33; Adjacent the latter is a relatively wide ilange portion 39 having an upper shoulder surface 40 extending lapproxhrnately tranversely of the axis i' The-upper end 4of barrel 12 is also provided with an internally threaded portion at 16 -into of cartridge 36. The lower end of cartridge 36 is provided with a cylindrical opening 41 extending axially through ilange portion 39 and communicating with the hollow interior of cartridge 36. rl`he latter is further provided with a transversely extending end face 42 on the side of ange portion 39 opposite said shoulder surface 4t).

A plug indicated generally by the reference numeral 43 is formed of resilient yieldable material, such as rubber or its equivalent, and is provided with a cylindrical portion 44 projecting into cartridge opening 41. Plug portion 44 is of a diameter slightly larger than the` internal diameter of opening 41 so as to be compressed therein and frictionally engage the interior surface thereof and thereby maintain plug 43 in assembled relation to cartridge 36. Integral with the plug cylindrical portion 44 is a circular flange portion 45 lying against the end face 42. of cartridge 36 and maintained in sealing engagement therewith by closure cap 30.

Closure cap 3@ is provided with a transverse wall portion 46 lying against plug ange portion 45 and pressing the latter inwardly into sealing engagement with the cartridge end face 42. Integral with wall portion 46 is a cylindrical wall portion 47 surrounding and preferably engaging the cartridge ange 39. The upper end of wall portion 47 is bent inwardly at 48 to engage the shoulder surface 4i) of cartridge ange portion 39 and thereby maintain closure cap 3i) and plug 43 `in sealed assembled relation with respect to cartridge 36. The cylindrical wall portion 47 of cap 30 frictionally engages the interior cylindrical surface of recess 35 in the upper end of needle mounting member 29 so as to maintain cartridge 36 and needle mounting member 29 in assembled relation with respect to each other.

Extending axially through needle mounting member 29 is a bore 49 adapted to receive a hollow hypodermic needle 50 extending therethrough. The upper end of needle G projects through a suitable aperture formed in plug ange portion 45 and through a bore S1 formed in plug body portion 44, whereby the upper or inner end of needle 50 communicates with the hollow interior of cartridge 36 to enable the medicinal huid therein to enter the hollow interior of needle 50 and pass therethrough. Extending upwardly from the `lower end of needle mounting member 29 is an enlarged bore 52 communicating at its upper end with the narrow bore 49 and coaxially aligned therewith. Press-fitted within bore 52 is the cylindrical portion 53 of a needle hub 54 tixedly secured to an intermediate portion of needle 50 so as to retain the latter in fixed assembled relation with respect to the needle mounting member 29. The lower end of hub 54 is provided with an enlarged ange 55 abutting against the lower end surface 56 of mounting member 29.

The latter is further provided with a tapered or conical portion 57 projecting downwardly from the enlarged ange or shoulder portion 31. A second conical portion 5S projects downwardly 'from portion 57 to the lower end face 56 of mounting member 29 and is of a reduced diameter to provide an annular shoulder 59 at the junction of conical portions 57 and 58.

A hollow tubular protective sleeve 60 surrounds the lower outwardly projecting portion of needle 50. The lower end of sleeve 60 is closed at 61 and its upper end is mounted on the reduced lower conical port-ion 58 of needle mounting member 29. Sleeve 6l) is preferably formed of a resilient yieldable material, such as rubber or plastic, whereby its upper end may be stretched when placed upon conical portion 58 so as to yieldably grip the latter in sealing engagement therewith. However, sleeve 6) may be quickly and easily removed from portion 58 by merely pulling sleeve 60 downwardly therefrom to slide its upper end ofi of conical portion 53.

The upper end of cartridge 36 is provided with a plunger 62 reciprocally slidable therein and formed with a stud 63 having an externally threaded portion 64 engaged within the internally threaded bore of cylindrical portion 24 on the lower end of rod 21. The upper end face 65 of cartridge 36 abuts against the lower end face 66 of a hollow cylindrical spacer sleeve 67 having an upper end face 68 abutting against an annular shoulder surface 69 formed on closure member 17 below the externally threaded portion 18 thereof. Spacer sleeve 67 presses down on the upper end of cartridge 36 and aids the frictional engagement between closure cap 3) and the cylindrical wall surface of recess 35 in maintaining cartridge 36 in fixed assembled relation within barrel 12 as plunger 62 -is pulled upwardly in an aspirating movement by the upward movement of rod 21. However, it will be obvious that the frictional engagement between closure cap 30 and the interior wall surface of cylindrical recess 35 may be made great enough to retain cartridge 36 against upward movement within barrel 12 during this aspirating action without the use of spacer sleeve 67, if so desired.

As shown in Figs. 1 and 2, the sub-assembly comprising needle mounting member 29, cartridge 36, needle 50 and sleeve 60 may be removed as a unit through the lower open end of barrel 12. If desired, this sub-assembly may be marketed as a commercial unit which may be quickly and easily inserted into assembled relation with respect to barrel 12 and then discarded after use.

Referring now to Fig. 4, there is shown a modied form of the invention substantially similar to the form shown in Fig. 3 and described above except that the closure means for retaining plug 43 is integral with needle mounting member 29 rather than in the form of a separate cap 30. Those elements of this second form of the invention which are similar to corresponding elements of the rst form described above are given corresponding reference numerals raised by units and will not be further described.

The cylindrical recess in the upper end of needle mounting member 129 of the mounting means indicated generally at 128 is of a diameter to receive the enlarged flange portion 139 of cartridge 136. The upper end ot' cylindrical portion 134 is bent inwardly at 170 to engage the shoulder surface 140 on cartridge ange portion 139. The bottom of recess 135 is formed with a transverse planar wall 171 abutting the ange portion 145 of the resilient plug 143 to maintain the ange portion 145 in sealing engagement with the end face 132 of cartridge ange portion 139. It will thus be seen that except for the fact that the closure cap and needle mounting member are integral to form a single unitary mounting means 128 in Fig. 4 as distinguished from the two separate frictionally secured elements 29 and 3|) in Fig. 3, the structures of Figs. 3 and 4 are identical.

It is to be understood that the specific embodiments of the invention shown in the drawing and described above are merely illustrative of two of the many forms which the invention may take in practice without departing from the scope of the invention as delineated in the appended claims. Therefore the latter are intended to be interpreted as broadly as the prior art permits and are not to be limited by the above disclosure.

Having thus described the invention, in some detail, what I claim as new and desire to secure by Letters Patent of the United States is:

l. In combination, a hollow hypodermic syringe barrel, a cartridge insertable upwardly only into the barrel through the lower end of the barrel, and having at one end thereof a relatively wide ange'portion and a reduced neck portion adjacent the latter and forming therewith a shoulder surface extending approximately transversely of the axis of the cartridge, said cartridge being hollow and having an axial opening extending through said flange and neck portions and communicating with the hollow interior of the cartridge, said flange portion having an end face extending approximately transversely of the cartridge ax-is, a plug formed oli-resilient yieldable material and having an enlarged flange portion integral with a body portion, said plug body portion projecting into said cartridge opening and frictionally engaging the interior surface of the latter, said plug flange portion lying against said end face of the cartridge ange portion and in sealing engagement therewith, a hollow needle extending coaxially of the cartridge and through said plug and having one end in communication with the interior of the cartridge, and mount-ing means for securing said needle and cartridge in assembled relation to the barrel of said hypodermic syringe barrel, said mounting means including closure means engaging said cartridge shoulder surface and said plug ange portion for pressing the latter inwardly toward said shoulder surface to maintain the plug ange portion in sealed engagement with said cartridge end face, said mounting means further including means having a bore coaxial with the cartridge and receiving the needle therethrough and ixedly secured to the needle, an externally threaded portion on said mounting means adapted to be screwed into an internally threaded opening adjacent the end of said syringe barrel through the lower end thereof.

2. In the combination recited in claim l, an annular shoulder on said mounting means adjacent said externally threaded portion of -greater diameter than the internal diameter of said barrel for abutting against a lower end surface of said syringe barrel to limit axial displacement of the mounting means relative to the barrel.

3. The combination recited in claim l wherein said closure means comprises a closure cap having a cylindrical portion extending around said cartridge ange portion, a transverse wall portion integral with said cylindrical wall portion at one end thereof and engaging said plug ange portion, the opposite end of said cylindrical portion being turned inwardly and engaging said cartridge shoulder surface.

4. The combination recited in claim 3 wherein said closure cap is an integral part of said mounting means.

5. The combination recited in claim 3 wherein said closure cap is formed of a single integral member separate from the remaining parts yof said mounting means, and means removably attaching said closure cap to the remaining parts of said mounting means.

6. In combination, a cartridge having at one end thereof a relatively wide ange portion forming a shoulder surface, said cartridge being hollow and having an axial opening extending through said ange portion and communicating with the hollow interior of the cartridge, said ange portion having an end face, a plug for said cartridge formed of resilient yieldable material and having an enlarged flange portion contacting said end face, a hollow needle extending coaxially of the cartridge and through said plug and having one end in communication 6 with the interior of the cartridge, and mounting means for securing said needle and cartridge in assembled relation to the barrel of a hypodermic syringe device, said mounting means comprising a needle mounting member have a bore therethrough for receiving said needle, means on said mounting member for securely gripping said needle, said needle mounting member having an upwardly extending externally threaded portion adapted to be screwed upwardly into an internally threaded portion of a syringe barrel, said mounting means further comprising closure means engaging said cartridgeshoulder surface and said plug tlange portion for maintaining the latter in sealed engagement against said end face of the cartridge and for maintaining the cartridge in secure assembled re-r lation within a syringe barrel.

7. The combination recited in claim 6 having a shoulder on said needle mounting member below said externally threaded portion for abutting against a lower end surface of a syringe barrel to limit axial displacement of the mounting means relative to the barrel. p

8. The combination recited in claim 6 in combination with a hypodermic syringe device having a hollow cylindrical barrel, said barrel having an opening in the lower end thereof and an internally threaded portion adjacent said opening, a shoulder surface on said one end of the barrel, said cartridge being located within the barrel, said mounting means projecting upwardly through vsaid barrel opening with said shoulder abutting said barrel shoulder surface, said mounting means externally threaded portion engaging said barrel internally threaded portion.

9. The combination recited in claim 7 wherein said closure means comprises a closure cap having a cylindrical portion extending around said cartridge flange portion, a transverse wall portion integral with said cylindrical wall portion at one end thereof and engaging said plug ange portion, the opposite end of said cylindrical portion being turned inwardly and engaging said cartridge shoulder surface.

10. The combination recited in claim 9 wherein said closure cap is an integral part of said mounting means.

11. The combination recited in claim 9 wherein said closure cap is formed of a single integral member separate from the remaining parts of said mounting means, and means removably attaching said closure cap to the remaining parts of said mounting means.

References Cited in the le of this patent UNITED STATES PATENTS 1,604,224 Friedman Oct. 26, 1926 1,624,327 Friedman Apr. 12, 1927 2,193,489 Nevin Mar. 12, 1940 2,554,352 Ward et a1 May 22, 1951 2,671,450 Dann Mar. 9, 1954 

